I have a number of old C programs which store binary data based on a struct.
Newer versions of the same program uses an updated struct.
Now I need to create a tool to update stored binary data to the new format.
So if you have a struct
typdef struct custom {
int a;
dword b;
byte c;
}
Then it would be nice if you could create a Cocinelle expression that parses
this struct and prints out "a b c".
This could then easily be changed to offsetof(custom,a); offsetof(custom,b);
offsetoff(custom,c); and finally create a new C-program that provide you with
all the offsets of the structured data as defined by the pragma settings and
the compiler.
if you look at the metadecl possibilities that Coccinelle support, then how
does it parse a struct?
a Coccinelle spatch like this:
---------------------
@r@
identifier v;
type t;
@@
typedef struct custom {
...
t v;
...
}
@ script:python @
t << r.t;
v << r.v;
@@
print "type" . t . "name" . v;
---------------------
obviously doesn't work, as it can't parse, but it should give an idea about
what I am trying to obtain.
Regards
Andreas Bach Aaen
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